Year 3
Using Dienes to multiply a 2 digit number by a 1 digit number
Year 3
Using Dienes to multiply a 2 digit number by a 1 digit number
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Lesson details
Key learning points
- In this lesson, we will learn to multiply 2 digit numbers by 1 digit numbers using Dienes blocks. We will use visual representations to make multiplication processes clearer, and we will investigate when to regroup quantities when using Dienes blocks.
Licence
This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.
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6 Questions
Q1.
Which is an example of partitioning?
10 divided by 2
6 x 3
Q2.
Partitioning makes multiplying two digit numbers easier.
False
Q3.
13 x 5 =
45
55
Q4.
17 x 3 =
121
24
Q5.
18 x 4 =
76
84
Q6.
Use what you know about place value to work out 180 x 4 =
760
840
5 Questions
Q1.
What is 22 x 4?
66
80
Q2.
What is the missing word? If there are ten or more ones, we must ______________ the ones into tens and ones.
partition
recombine
Q3.
Do you need to regroup ones into tens when calculating 11 x 7?
Yes
Q4.
Do you need to regroup tens when calculating 43 x 4?
No
Q5.
What do you need to regroup when calculating 45 x 5?
Ones
Tens